import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'
import Layout from '@/layout'
import { notFound } from '@/router'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

function formatRoute(menu) {
  const menu_list = []
  let i = 0
  menu.forEach(item => {
    menu_list[i] = {
      path: item.path,
      component: item.component === '' ? Layout : (s, j) => require(['@/views/' + item.component], s, j),
      name: 'admin_' + item.name + '_' + item.id,
      meta: { title: item.name, icon: item.icon }
    }

    if (item.children) {
      menu_list[i].children = formatRoute(item.children)
    }
    i++
  })

  return menu_list
}

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name

      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // get user info
          await store.dispatch('adminUser/getInfo')

          const menus = await store.dispatch('adminUser/getUserMenus')
          const menu_list = formatRoute(menus)
          const routes = router.options.routes
          router.options.routes = routes.concat(menu_list).concat(notFound)
          router.addRoutes(menu_list)

          next({ ...to, replace: true })
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('login/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
